export default {}.install = (Vue, options = {}) => {
    Vue.directive('loadmore', {
        inserted (el, binding) {

            // 获取element-ui定义好的scroll盒子
            // const SELECTDOWN_DOM = el.querySelector('.el-select-dropdown .el-select-dropdown__wrap')
            el.addEventListener('scroll', function () {
                const CONDITION = this.scrollHeight - this.scrollTop <= this.clientHeight
                if (CONDITION) {
                    binding.value()
                }
            })
        }
    })
}